Hello,
I've put together some notes on upgrading a Fedora system from i386 to
x86_64:
http://www.codewiz.org/wiki/Fedora64bitUpgrade
Feel free to edit the page with additional information, or move it to
the Fedora wiki if it seems useful.
--
// Bernie Innocenti -
http://www.codewiz.org/
\X/ Sugar Labs -
http://www.sugarlabs.org/